We can return the creation context of the [[BoundTargetFunction]], and
don't need to remember the context in which the function was bound.
R=verwaest@chromium.org
BUG=chromium:535408
LOG=n
Review URL: https://codereview.chromium.org/1590273002
Cr-Commit-Position: refs/heads/master@{#33332}
Respective declarations will explicitly initialise slots
with the hole anyway, so this always was unnecessary.
With varblocks it even became wrong, because block contexts
may now host var bindings, which want undefined.
Fixes the hole leaking when accessing an unitialised,
block-context-allocated var.
R=neis@chromium.org
BUG=571149
LOG=N
Review URL: https://codereview.chromium.org/1584243002
Cr-Commit-Position: refs/heads/master@{#33309}
That will allow for adding private symbols to JSProxies in a follow-up
change
BUG=chromium:571365
R=neis@chromium.org,verwaest@chromium.org,rossberg@chromium.org
LOG=n
Review URL: https://codereview.chromium.org/1575423002
Cr-Commit-Position: refs/heads/master@{#33241}
This CL introduces ExternalStringResourceBase::IsCompressible.
This CL is a preparation for CompressibleString, which can
be compressed for memory reduction in Blink. We've found that
JavaScript strings account for a relatively large part of Blink
memory usage, and we are now trying to replace JavaScript String/
AtomicString with CompressibleString.
When a string is compressed, the original char data is deleted
and V8 pointer cache becomes invalid. This CL introduces
isCompressible property and if an external string's isCompressble
return true, this is stored short_external_*_map instead of
external_*_map so that V8 always requires the char pointer whenever
V8 needs the string data.
BUG=chromium:574317
LOG=n
Review URL: https://codereview.chromium.org/1490193002
Cr-Commit-Position: refs/heads/master@{#33224}
For a prototype chain foo -> global_proxy -> global_object, we used to
register a dependency from foo -> global_object. This is incorrect when
the global_proxy/global_object pairing is modified, e.g. when navigating
in iframes. With this patch, we properly register foo -> global_proxy and
global_proxy -> global_object dependencies.
Additionally, when a prototype's prototype changes from null to something
else, this new usage relation must be registered if there are other users
further down on the prototype chain that might expect a complete chain of
registrations to exist (which was the case before, and must be preserved).
BUG=chromium:571517
LOG=n
R=verwaest@chromium.org
Review URL: https://codereview.chromium.org/1559323002
Cr-Commit-Position: refs/heads/master@{#33119}
According to the ES2015 specification, bound functions are exotic
objects, and thus don't need to be implemented as JSFunctions. So
we introduce a new JSBoundFunction type to represent bound functions
and make them optimizable. This already improves the performance of
calling or constructing bound functions by 10-100x depending on the
use case because we avoid the crazy dance between JavaScript and C++
that was implemented in v8natives.js previously.
There's still room for improvement in the performance of actually
creating bound functions, which is also relevant in practice, but
we already have a plan how to accomplish that later.
The mips/mips64 ports were contributed by akos.palfi@imgtec.com.
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
BUG=chromium:535408, chromium:571299, v8:4629
LOG=n
Committed: https://crrev.com/ca8623eaa468cba65a5adafcdfb4615966f43ce2
Cr-Commit-Position: refs/heads/master@{#33042}
Review URL: https://codereview.chromium.org/1542963002
Cr-Commit-Position: refs/heads/master@{#33044}
Reason for revert:
Breaks arm64 sim nosnap: https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20arm64%20-%20sim%20-%20nosnap%20-%20debug/builds/805/steps/Check/logs/function-bind
Original issue's description:
> [runtime] Introduce dedicated JSBoundFunction to represent bound functions.
>
> According to the ES2015 specification, bound functions are exotic
> objects, and thus don't need to be implemented as JSFunctions. So
> we introduce a new JSBoundFunction type to represent bound functions
> and make them optimizable. This already improves the performance of
> calling or constructing bound functions by 10-100x depending on the
> use case because we avoid the crazy dance between JavaScript and C++
> that was implemented in v8natives.js previously.
>
> There's still room for improvement in the performance of actually
> creating bound functions, which is also relevant in practice, but
> we already have a plan how to accomplish that later.
>
> The mips/mips64 ports were contributed by akos.palfi@imgtec.com.
>
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
> BUG=chromium:535408, chromium:571299, v8:4629
> LOG=n
>
> Committed: https://crrev.com/ca8623eaa468cba65a5adafcdfb4615966f43ce2
> Cr-Commit-Position: refs/heads/master@{#33042}
TBR=cbruni@chromium.org,hpayer@chromium.org,yangguo@chromium.org,akos.palfi@imgtec.com
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:535408, chromium:571299, v8:4629
Review URL: https://codereview.chromium.org/1552473002
Cr-Commit-Position: refs/heads/master@{#33043}
According to the ES2015 specification, bound functions are exotic
objects, and thus don't need to be implemented as JSFunctions. So
we introduce a new JSBoundFunction type to represent bound functions
and make them optimizable. This already improves the performance of
calling or constructing bound functions by 10-100x depending on the
use case because we avoid the crazy dance between JavaScript and C++
that was implemented in v8natives.js previously.
There's still room for improvement in the performance of actually
creating bound functions, which is also relevant in practice, but
we already have a plan how to accomplish that later.
The mips/mips64 ports were contributed by akos.palfi@imgtec.com.
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
BUG=chromium:535408, chromium:571299, v8:4629
LOG=n
Review URL: https://codereview.chromium.org/1542963002
Cr-Commit-Position: refs/heads/master@{#33042}
Add API-accessors for [[ProxyTarget]], [[ProxyHandler]]. Additionally
create new proxies and revoke proxies via the API.
BUG=v8:1543
LOG=n
Review URL: https://codereview.chromium.org/1542943002
Cr-Commit-Position: refs/heads/master@{#33013}
Add an internal field to each wasm function to keep a reference to the module. (So the GC can do the right thing when you only hold references to wasm functions but not the module).
Use Realloc carefully, to avoid copying from out of bounds.
Make snprintf use platform independent.
Don't disconnect external arraybuffers provided for the heap.
R=ahaas@chromium.org
BUG=
Review URL: https://codereview.chromium.org/1531243003
Cr-Commit-Position: refs/heads/master@{#32951}
No need to have an indirection to get to the initial JSArray maps from
the native context; we only cache the fast elements maps anyway, so
those could live on the native context directly. This will also
integrate nicely with the load/store propagation in TurboFan (once we
propagate the immutable flag for FieldAccess as well).
Drive-by-fix: Also don't embed any of the initial JSArray maps in
TurboFan generated code when allocating a new JSArray, but instead
always load the appropriate map from the native context. This way
we ensure that we never leak a reference to one of those maps and
its as efficient as embedding a constant map.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1516433005
Cr-Commit-Position: refs/heads/master@{#32779}
We either want to add code+literals to the map, or just literals.
A recent change in the structure of the map (it now uses WeakCells)
meant that we have to be more clear about what we want to do the right
thing.
BUG=
Review URL: https://codereview.chromium.org/1516833002
Cr-Commit-Position: refs/heads/master@{#32761}
It's expensive to walk all shared function infos during the gc atomic
pause. Instead, use WeakCells to implement this structure without
manual clearing.
Reland due to a bug when reusing entries in the optimized code map.
BUG=
Review URL: https://codereview.chromium.org/1508703002
Cr-Commit-Position: refs/heads/master@{#32696}
It's expensive to walk all shared function infos during the gc atomic pause. Instead, use WeakCells to implement this structure without manual clearing.
BUG=
Review URL: https://codereview.chromium.org/1478943003
Cr-Commit-Position: refs/heads/master@{#32567}
It didn't support subclassing case at all and in non-subclassing case the runtime
allocation didn't do the slack tracking step.
BUG=chromium:563339
LOG=Y
Review URL: https://codereview.chromium.org/1488023002
Cr-Commit-Position: refs/heads/master@{#32547}
This way we avoid the %_IsSmi magic that is required in TurboFan to
(efficiently) check abitrary context slots for smi 0. Checking against
"the hole" is common in the AstGraphBuilder and "the hole" is also used
to mark other context slots as not initialized.
R=mstarzinger@chromium.org
Review URL: https://codereview.chromium.org/1484723003
Cr-Commit-Position: refs/heads/master@{#32407}
Reason for revert:
Broken canary. Trying to find out root cause.
Original issue's description:
> Introduce instance type for transition arrays.
>
> The motivation is to allow specialized marking visitor for transition arrays and collect all transition array in a list for post-processing in ClearNonLiveReferences.
>
> BUG=chromium:554488
> LOG=NO
>
> Committed: https://crrev.com/026095a3c7932573e1810b8064ec3008ed696601
> Cr-Commit-Position: refs/heads/master@{#32396}
TBR=mlippautz@chromium.org,jkummerow@chromium.org,ulan@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:554488
Review URL: https://codereview.chromium.org/1483003002
Cr-Commit-Position: refs/heads/master@{#32404}
The motivation is to allow specialized marking visitor for transition arrays and collect all transition array in a list for post-processing in ClearNonLiveReferences.
BUG=chromium:554488
LOG=NO
Review URL: https://codereview.chromium.org/1480873003
Cr-Commit-Position: refs/heads/master@{#32396}
Previously all contexts had a link to the global object, but what is
required in most cases (except for the global load, store and delete
case) is the native context.
This also removes the second dummy global object that was still linked
to every native context. We will add a different mechanism to ensure
that builtins do not pollute the actual global object during
bootstrapping.
Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.
CQ_INCLUDE_TRYBOTS=tryserver.v8:v8_linux_nosnap_rel
R=yangguo@chromium.org,mstarzinger@chromium.org
Committed: https://crrev.com/d290f204938295bfecc5c8e645ccfcff6e80ddb8
Cr-Commit-Position: refs/heads/master@{#32375}
Review URL: https://codereview.chromium.org/1480003002
Cr-Commit-Position: refs/heads/master@{#32381}
Reason for revert:
[Sheriff] Breaks:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap/builds/5472
Original issue's description:
> [runtime] Replace global object link with native context link in all contexts.
>
> Previously all contexts had a link to the global object, but what is
> required in most cases (except for the global load, store and delete
> case) is the native context.
>
> This also removes the second dummy global object that was still linked
> to every native context. We will add a different mechanism to ensure
> that builtins do not pollute the actual global object during
> bootstrapping.
>
> Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.
>
> R=yangguo@chromium.org
>
> Committed: https://crrev.com/d290f204938295bfecc5c8e645ccfcff6e80ddb8
> Cr-Commit-Position: refs/heads/master@{#32375}
TBR=yangguo@chromium.org,mstarzinger@chromium.org,bmeurer@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
Review URL: https://codereview.chromium.org/1478303002
Cr-Commit-Position: refs/heads/master@{#32377}
Previously all contexts had a link to the global object, but what is
required in most cases (except for the global load, store and delete
case) is the native context.
This also removes the second dummy global object that was still linked
to every native context. We will add a different mechanism to ensure
that builtins do not pollute the actual global object during
bootstrapping.
Drive-by-fix: Unify some MacroAssembler magic and drop obsolete stuff.
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1480003002
Cr-Commit-Position: refs/heads/master@{#32375}
This replaces internal GetConstructorName with toStringTag, .constructor's name
and class_name. This entirely changes how the name is computed for use in
devtools.
BUG=chromium:529177
LOG=n
Review URL: https://codereview.chromium.org/1435273002
Cr-Commit-Position: refs/heads/master@{#32374}
ES6 section 12.2.8.1 states that flags for regular expression literals
must be checked during parsing and invalid flags are early errors. This
change adapts the Scanner and (Pre)Parser to act according to the spec.
This is also a prerequisite to unify the handling of literal creation
(for Objects, Arrays, Regexps, and at some point Classes).
R=yangguo@chromium.org
Review URL: https://codereview.chromium.org/1472323002
Cr-Commit-Position: refs/heads/master@{#32273}
This removes several methods from JSFunction that just delegate to
SharedFunctionInfo. These methods are especially dangerous when they
hide the fact that they potentially affect all function instances
deriving from the same underlying SharedFunctionInfo.
R=bmeurer@chromium.org
Review URL: https://codereview.chromium.org/1417213005
Cr-Commit-Position: refs/heads/master@{#31792}
Original issue's description:
> [es6] Fix Function and GeneratorFunction built-ins subclassing.
>
> BUG=v8:3101, v8:3330
> LOG=Y
>
> Committed: https://crrev.com/99e7f872d3d0a5fb799dcbafb05537cda491314a
> Cr-Commit-Position: refs/heads/master@{#31708}
The problem was in another CL, this is a clean reland with improved tests.
BUG=v8:3101, v8:3330
LOG=Y
Review URL: https://codereview.chromium.org/1415683007
Cr-Commit-Position: refs/heads/master@{#31756}
The compiler can generate a named access for o[x] if x is a compile time
constant that can be turned into a name using ToName (limited to
primitive x values, because other ToName invocations might be observable),
or the KeyedLoadIC/KeyedStoreIC have gather constant name feedback for x
(i.e. the access always goes to the same symbol).
R=jarin@chromium.org
BUG=v8:4470
LOG=n
Review URL: https://codereview.chromium.org/1414013004
Cr-Commit-Position: refs/heads/master@{#31703}
Thus TypeFeedbackMetadata can now be shared between different native contexts.
Review URL: https://codereview.chromium.org/1384673002
Cr-Commit-Position: refs/heads/master@{#31143}
This CL also allows to use arbitrary number of feedback vector elements for particular slot kind.
Review URL: https://codereview.chromium.org/1370303004
Cr-Commit-Position: refs/heads/master@{#31050}
